Stop blinking cursor on hero when farlooking

I happened to notice when looking at a ttyrec that farlooking
with automatic description would blink the cursor on hero for
one frame, and then back on the farlooked map location.

include/hack.h

@@ -499,6 +499,7 @@ typedef uint32_t mmflags_nht;     /* makemon MM_ flags */
 #define URGENT_MESSAGE   8
 #define PLINE_VERBALIZE 16
 #define PLINE_SPEECH    32
+#define NO_CURS_ON_U    64
 
 /* get_count flags */
 #define GC_NOFLAGS   0

src/do_name.c

@@ -621,7 +621,7 @@ auto_describe(coordxy cx, coordxy cy)
     if (do_screen_description(cc, TRUE, sym, tmpbuf, &firstmatch,
                               (struct permonst **) 0)) {
         (void) coord_desc(cx, cy, tmpbuf, iflags.getpos_coords);
-        custompline((SUPPRESS_HISTORY | OVERRIDE_MSGTYPE),
+        custompline((SUPPRESS_HISTORY | OVERRIDE_MSGTYPE | NO_CURS_ON_U),
                     "%s%s%s%s%s", firstmatch, *tmpbuf ? " " : "", tmpbuf,
                     (iflags.autodescribe
                      && getpos_getvalid && !(*getpos_getvalid)(cx, cy))

src/pline.c

@@ -179,7 +179,7 @@ vpline(const char *line, va_list the_args)
     if (gv.vision_full_recalc)
         vision_recalc(0);
     if (u.ux)
-        flush_screen(1); /* %% */
+        flush_screen((gp.pline_flags & NO_CURS_ON_U) ? 0 : 1); /* %% */
 
     putmesg(line);